3828217973778 has 96 divisors (see below), whose sum is σ = 9117511865280. Its totient is φ = 1151227486080.

The previous prime is 3828217973729. The next prime is 3828217973821. The reversal of 3828217973778 is 8773797128283.

It is a happy number.

3828217973778 is a `hidden beast` number, since 3 + 8 + 2 + 82 + 179 + 7 + 377 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67042576 + ... + 67099652.

It is an arithmetic number, because the mean of its divisors is an integer number (94974081930).

Almost surely, 2^{3828217973778} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3828217973778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4558755932640).

3828217973778 is an abundant number, since it is smaller than the sum of its proper divisors (5289293891502).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3828217973778 is a wasteful number, since it uses less digits than its factorization.

3828217973778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59672 (or 59669 counting only the distinct ones).

The product of its digits is 398297088, while the sum is 72.

The spelling of 3828217973778 in words is "three trillion, eight hundred twenty-eight billion, two hundred seventeen million, nine hundred seventy-three thousand, seven hundred seventy-eight".